Year	% of relevant age group
1978	24.9469509124756
1979	25.637300491333
1980	25.7553806304932
1981	25.5360908508301
1982	24.9837303161621
1983	25.8722991943359
1984	26.2663593292236
1985	26.3013496398926
1986	26.5418300628662
1987	26.2697296142578
1988	26.5801906585693
1989	26.6296997070312
1990	26.7754802703857
1991	27.0289707183838
1992	27.1262092590332
1993	27.2489204406738
1994	27.3404006958008
1995	27.8103904724121
1996	27.9868907928467
1997	28.186559677124
1998	28.4680099487305
1999	29.223970413208
2000	30.1651096343994
2001	31.4169292449951
2002	32.8571014404297
2003	33.7220916748047
2004	33.0966491699219
2005	33.7956809997559
2006	35.1764984130859
2007	36.4747886657715
2008	38.1546592712402
2009	39.5295715332031
2010	40.3880310058594
2011	41.6355018615723
2012	42.9077491760254
2013	43.7747383117676
2014	44.7044982910156
2015	45.8073806762695
2016	46.6890983581543
2017	47.2900009155273
2018	48.4962196350098
2019	48.7448310852051
2020	48.8985290527344